Degasser for internal-combustion engines



Feb. 26, 46. M. MALLORY ,2,395,748

DEGASSER FOR INTERNAL-.COMBUSTION ENGINES Filed Oct. 26, 1945 2Sheets-Sheet 2 l Nv E NTO R Mar/0n Ma//ary DEGASSER FORINTERNAL-COMBUSTION ENGINES u Marion Mallory, Detroit, Mich.

Application October' 26, 1945, Serial No. 624,750

(Cl. 12S-97) Claims.

This invention relates to a degasser for an internal combustion engine.

It is the object of this invention to produce such`a degasser which isof simple structure, efflcient and reliable in operation and easilyinstalled on the engine as original or accessory equipment. This objectis accomplished by means of a throttle valve in the intake passageway onthe engine side of the carburetor throttle valve which is automaticallyclosed in response to intake passageway pressure whenever the carburetorthrottle valve is closed and the engine is operating above a givenspeed. The closing ci this valve causes substantially atmosphericpressure at the carburetor jets which stops the iiow oi fuel into theengine and at the same time -admits air into the intake manifoldbetweenthe engine and throttle valve to dilute any rich mixtures thatmight be trapped in themanifold on a sudden closing of the throttlevalve, also reducing the vacuum over the pistons to reduce the drawingup of oil from the crank case into the combustion chamber.

Fig. i is a vertical section through my degasser assembled to the intakepassageway.

Fig. 2 is a vertical section through a modiiied form of myv degasser.

Fig. 3 is a section through a modied'form of air bleed Valve mechanism.

The elements shown in the drawings are refer- ,ence'd as follows; intakepassageway I, air inlet 2;', fuelbowlv 3, venturi d, main fuel nozzle 5,idle jets 5j?, throttle valve 8 of the butteriiy type, valve shaft 9,crank i0 fixed onshaft 9, rod by means of which throttle 8 is eithermanually or foot controlled, rod |3 pivotally connected at one end tocrank iii and carrying valve It at its other end, voutlet i5 to theengine, passageway i6 connecting idle jets t and 'l into fuel pipethrottle valve i8 of the butterfly type fixed on shaft is, crank Z, rod2| pivoted at one end to crank 2G and fixed at the other end todiaphragm 22 of suction device 23, conduit 2t connecting oriice 25 withorifice 26 in valve housing 27|, conduit 28 connecting orifice 29 withsuction chamber 3@ oi suction device 23, compression spring @E tendingto act through rod 2| to hold valve it open, valve 32 havingcircumferential groove 35i, rod 321i connecting valve 32 with flexiblediaphragm 35 in suction device 35, compression spring 3i tending to movevalve 32 downwardly, conduit 38 connecting suction chamber 39 with airbleed port iti and with conduit di, conduit t2 communicating withconduit it and with oriiice it on the engine side of valve It,centrifugal valve housing M, stationary housing 45 open to atmospherethrough Iport 46, valve shaft lll which is driven off the engine so thatit rotates in accordance with the speed of the engine, circumferentialpassageway 68, T passageway in shaft di continuously communicating withpassageway it and with valve cylinder 5|), centrifugally unbalancedvalve 5|, air bleed port 52 controlled by valve 5|, bypass passageway 53permittingair to ow from port 52 to passageway i9 when valve 5| is open,tension spring 5t tending to hold valve 5| open.

The operation of my device is as follows: Throttle valve |8 is theconventional carburetor butteriiy throttle valve which, when in idleposition, will permit suiiicient charge to flow through the intakepassageway to run the engine at idle speed. Throttle valve i5, however,is arranged so that when in closed position it will substantiallycompletely shut off intake passageway so that no fuel charge can pass byvalve IB. Spring 54 is tensioned so that valve 5i will close air bleedport 52 whenever the engine exceeds a predetermined speed, such, forexample, as 800 R. P. M. As shown in the drawings, ythrottle valve 8 isclosed or in idle position and the engine is decelerating and running ata speed higher than, say, for example, about 800 R. P. M. In

other words, the vehicle is overrunning the engine. At this time stoppervalve ifi has air speed d0 closed so that the intake passageway vacuumor suction at port i3 is established through conduits 42, lil and 38 insuction chamber 39, thereby causing suction device or servomotor 36 toraise valve 32 and place groove 33 in registry with ports 2s and 25.This permits the intake passageway vacuum at port 25 to becomeestablished in suction chamber 3|] which causes suction device 23,acting through rod 2i and crank 2B, to draw valve |8 tight1y.closed.When valve i8 closes completely, the pressure in intake passageway onthe atmosphere side of valve I8, orspecically at jets 5, 5 and i, isatmospheric mosphere and thereby permit spring 3| to move valve I8 wideopen. When valve I8 opens, then intake manifold vacuum is established onthe engine side of throttle valve 8 at port 1 and air is again drawnthrough inlet 2 to thereby draw fuel out of idle jet 1 suicient to feedan idle charge to the engine. This will maintain the engine at idlespeed.

When throttle valve 8 is open, then regardless of the engine speed,valve I4 will move clear of port 40 so that chamber 39 will bleed toatmosphere and valve 32 will be in lowered position to maintain groove60 in communication with port 29 to thereby bleed port 30 to atmosphereand maintain valve I8 wide open.

In Fig. 1, the parts, such as valves 32, 5I, I4 are all shown to be in aposition when the vehicle is being decelerated above 800 R. P. M.

In the moded form shown in Fig. 2, the elements which differ from theelements shown in Fig. 1 are referenced as follows: unbalanced valve 6Ifor completely closing oi intake passageway I, crank 64 having extension63, tension spring 65 tending to hold valve 6I open, piston valve B6connected by rod ,61 to flexible diaphragm 68, air bleed port 08communicating by conduit l with port 1I, port 12 on the engine side ofvalve 6I communicating with port 13 by conduit 1l, circumferentialpassageway 15 in valve E6, rod 11 having abutment 18 arranged to contactextension 63 of crank 64, suction chamber 19icommnnicating by means ofconduit 80 with conduit8I and passageway 48, and port 82 in the intakepassageway.

In Fig. 2, the parts are: in a position when the vehicle is beingdecelerated above an engine speed of 800 R. P. M.

The operation of the modified form of my device is as follows: It isunderstood that valve El can .'be controlled by any conventionalgovernor mechanisms such as the centrifugal weight type of governor orby the intake passageway suction as shown in my Patent 2,381,550. Thisinvention can be used in commotion with the different types of speedgovernors. Valve 6I would be the engine speed governor valve and myinvention vis simply applied to the engine speed governor. The importantthing is that governor valve 6I is arranged so that, when the enginereaches its governed speed, valve 6I will move toward closed position tothrottle the charge and maintain the engine at its governed speed in themanner of the conventional type governor. Assuming the engine was beingdecelerated from a speed above 800 R. P. M., throttle valve 8 would beclosed, orifice 52 would be closed 'by piston valve I and conduit 40would be closed. Suction then would establish in chamber 19 which wouldpull engine speed governor valve BI absolutely closed and cause pistonvalve 66 to permit air to flow into the manifold through conduit 14.Even though the throttle 8 remained closed and orifice 40 remainedclosed, the carbureting system would go back to normal before the engineever reached an idle speed because port 52 would be opened by piston 5Iand this would bleed air into suction chamber 19. Under such conditionspiston valve 66 would move to the left to release valve 6I and closeconduit 14 and y stalling of the engine is thereby prevented at idle ordeceleration.

It is understood that my device can be used other than with a speedgovernor as shown in Figs. 1 and 2.

In the form of my invention shown in Fig. 1. I could use suction device36 to directly open and close valve I8 and thereby omit suction device23 and intermediate valve mechanism 32. However, I prefer thearrangement shown in Fig. l because considerable power is required toclose valve I8l especially if it is opposed by a governor spring such as65 in Fig. 2, and in such case servomotor 23 and its diaphragm 22 willbe made considerably larger than servo-motor 30, which latterservo-motor simply serves as a remote controller for the largerservo-motor 23.

Instead of mechanically operating valve I4, I can operate .this valve,as shown in Fig. 3, by means of the intake passageway suction. As shownin Fig. 3, valve |00 controls air Ibleed i0 and is mounted in valvehousing IOI which communicates with intake passageway I on the engineside of valve 8 through port |02. Valve I00 is provided with acircumferential groove |03 which normally communicates with port t0 andconduit 38 due to the action of compression spring |04. In this form ofthe invention when throttle valve 8 is closed or in idle position, thesuction at orifice |02 causes valve I00 to shift to the left and closeoi air bleed port 40. As soon as valve il is opened from idle positionport |02 passes into the atmosphere and spring |04 moves valve IDI) tothe right and thereby places circumferential groove I03 in communicationwith port D and conduit 38 to admit atmosphere into chamber 38.

I claim:

l. In an internal combustion engine'having an intake passageway and athrottle valve in said passageway, a vacuum operated fuel jet fordelivering fuel into the intake passageway, a second throttle valve insaid intake passageway on the engine side of said first mentionedthrottle valve forgshutting off the ow of motive fluid to said enginewhen closed, means actuated through changes of pressure in the intakepassageway on the engine side of said second throttle valve forimparting movement to said second throttle valve. an air bleed toatmosphere for said pressure actuated means, means for closing said airbleed whenever the first mentioned throttle valve is in substantiallyclosed position, and a speed controlled air bleed to atmosphere for saidpressure actuated means arranged to close whenever the engine reaches apredetermined speed whereby whendooth of said air bleeds are closed saidpressure actuated means moves said second throttle' valve to closedposition to thereby stop the -liovv of fuel from said jet into theintake passageway.

2. In an internall combustion engine having an -intake passageway `and amanually controlled throttle valve in said passageway, a vacuum operatedfuel jet for delivering fuel into the intake passageway, a secondthrottle valve in said intake passageway on the engine side of saidfirst mentioned throttle valve for shutting off the flow of motive uidto said engine when closed, means actuated through changes of pressurein the intake passageway on the engine side of said second throttlevalve for imparting movement to said second throttle valve, an air bleedto atmosphere for said pressure actuated means, means for closing saidair bleed whenever the first mentioned throttle valve is insubstantially closed position, a second air bleed to atmosphere for saidpressure actuated means, and a speed controlled centrifugal valvearranged to close said second air bleed whenever the engine reaches apredetermined speed whereby when said manual throttle valve is closedand the engine is running above said predetermined speed both of saidair bleeds will be closed and said pressure actuated means will movesaid second throttle valve to closed position to thereby raise thepressure in the intake passageway on the atmosphere side of said secondthrottle valve to substantially atmospheric pressure and thereby stopthe flow of fuel from said jet.

3. In an internal combustion engine having an intake passageway and athrottle valve in said passageway, a vacuum operated fuel jet fordelivering fuel into the intake passageway, a second throttle valve insaid intake passageway on the engine side of said rst mentioned throttlevalve for shutting olf the flow of motive fluid to said engine whenclosed, means actuated through changes of pressure in the intakepassageway on the engine side of said second throttle valve forimparting movement to said second throttle valve, an air bleed toatmosphere for said pressure actuated means, a valve for closing saidair bleed, a connection between said air bleed valve and the rstmentioned throttle v alve whereby said air bleed valve is closedwhenever the throttle valve is in idle position, and a speed controlledair bleed to atmosphere for said pressure actuated means arranged toclose whenever the engine reaches a predetermined speed whereby whenboth of said air bleeds are closed said pressure actuated means movessaid second throttle valve to closed position to thereby stop the ow offuel from said jet into the intake passageway.

4. In an internal combustion engine having an intake passageway and amanually controlled throttle valve in said passageway, a vacuum operatedfuel jet for delivering fuel into the intake passageway, a secondthrottle valve in said intake passageway on the engine side of said rstmentioned throttle valve for shutting off the ow of motive fluid to saidengine when closed, means actuated through changes of. pressure in thei-ntake passageway on the engine side of said second throttle valve forimparting movement to said second throttle valve, an air bleed toatmosphere for said pressure actuated means, a valve for closing saidair bleed, a connection between said air bleed valve and the manualthrottle valve whereby said air bleed is closed whenever the manualthrottle valve is in idle position, a second air bleed to atmosphere forsaid pressure actuated means, and a speed controlled cenering fuel intothe intake passageway, a speed governor throttlevalve in said intakepassagey way on the engine side of said first mentioned trifugal valvearranged to close said second air bleed whenever the engine reaches apredetermined speed whereby when said manual throttle valve is closedand the engine is running above said predetermined speed both of saidair bleeds vwill be closed and said pressure actuated means will movesaid second throttle valve to closed Iposition to thereby raise thepressure in the intake passageway on the atmosphere side of said secondthrottle valve to substantially atmospheric pressure and thereby stopthe flow of .fuel

passageway, a vacuum operated fuel jet for delivthrottle valve adaptedto move toward closed position whenever the engine reaches its governedspeed, means actuated througlrchanges of pressure in the intakepassageway on the engine side of said governor throttle valve forimparting movement to said governor throttle valve, an air bleed toatmosphere for said pressure actuated means, means for closing said airbleed whenever the first mentioned throttle valve is in substantiallyclosed position, and a speed controlled air bleed to atmosphere for saidpressure actuated means arranged to close whenever the engine reaches apredetermined speed whereby when both of said air bleeds are closed saidpressure actuated means moves said governor. throttle valve to closedposition to thereby stop the flow of fuel from said jet into the intakepassageway.

'7. In an internal combustion engine having an intake passageway and amanually controlled throttle valve in said passageway, a vacuum operatedfuel'jet for delivering fuel into the intake passageway, a speedcontrolled governor throttle valve in said passageway on the engine sideof said manually controlled throttle valve and adapted to move towardclosed position whenever the engine reaches its governed speed, meansactuated through changes of pressure in the intake passageway on theengine side of said governor throttle valve for imparting movement tosaid governor throttle valve, an air bleed to atmosphere for saidpressure actuated means, means for closing said air bleed whenever thefirst mentioned throttle valve is in substantially closed position, asecond-air bleed to atmosphere for said pressure actuated means, and aspeed controlled centrifugal valve arranged to close said second airbleed whenever the engine reaches a predetermined speed whereby whensaid manual throttle valve is closed and the engine'is running abovesaid predetermined speed both of said air bleeds will be closed and saidpressure actuated means will move said second throttle valve to closedposition to thereby raise the pressure in the intake passageway on theatmosphere side of said second throttle valve to substantiallyatmospheric pressure and thereby stop the flow of fuel from said liet.-l

81. In an internal combustion engine having an intake passageway and athrottle valve in said passageway, a vacuum operated fuel jet fordelivering fuel into the intake passageway, a speed controlled governorthrottle valve in said intake passageway on the engin'e side of said rstmentioned throttle valve and adapted to m'ove toward clcsedpositionwhenever` the engine reaches its governedv speed, meansactuated throughchanges of pressure in the int yke passageway 'on the engine side ofsaid governor throttle valve for imparting movement to said governorthrottle' valve, an air bleed to atmosphere for said pressure actuatedmeans, a valve for closing said -air bleed, a connection between saidair bleed valve and the rst mentioned throttle valve whereby said airbleed valve is closed whenever the throttle valve is in idle position,and a speed controlled air bleed to atmosphere for said pressureactuated means arranged to close whenever the engine reaches apredetermined speed where- .by when both of said air bleeds are closedsaid `pressure actuated means moves said governor throttle' valve toclosed position to thereby stop the flow of fuel from said jet into theintake passageway.

9. In an internal combustion engine having an intake passageway and amanually operated throttle valve in said passageway, a vacuum operatedfuel jet for delivering fuel into the intake passageway, a speedcontrolled governor throttle valve in the intake` passageway on theengine side of said first mentioned throttle valve and adapted to movetoward closed position when ever the engine reaches itsgoverned speed,means actuated through changes of pressure in the intake passageway onthe engine side of said governor throttle valve for imparting movementto said governor throttle valve, an air bleed to atmosphere for saidpressure actuated means, a valve for closing said air bleed, aconnection between said air bleed valve and the manual throt` tle valvewhereby said air bleed valve is closed whenever the manual throttlevalve is in idle position, a second air bleed to atmosphere for said l0.In an internal combustion engine having an intake passageway and athrottle valve in said passageway, a vacuum operated fuel jet fordelivering fuel into the intake passageway, a second throttle valve insaid intake passageway on the' engine side of said first mentionedthrottle valve for shutting ori the flow of motive fluid to said enginewhen closed, means actuated through changes of pressure in the intakepassageway on the engine side of said second throttle valve forimparting movement to said second throttle valve, an air bleed toatmosphere for said pressure actuated means, a valve for controllingsaid air bleed, a second means actuated through changes of pressure inthe intake passageway on the engine side of said second throttle valvefor imparting movement to said air bleed valve, an air bleed toatmosphere for said second pressure actuated means, means for closingsaid second air bleed whenever the first mentioned throttle valve is insubstantially closed position, and a speed Y controlled air bleed toatmosphere for said second pressure actuated means arranged to closewhenever the engine reaches a predetermined speed whereby when saidsecond air bleed and speed controlled air bleed are closed said secondpressure actuated means moves said first air bleed valve to closedposition to thereby cause said first pressure actuated means to respondto intake passageway pressure and thereby close said second throttlevalve which stops the flow of fuel from said jet into the intakepassageway.

MARION tirar-triomf.

